mirror of
https://github.com/ceph/ceph-csi.git
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105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resolver
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import (
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"encoding/json"
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"fmt"
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"strings"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/discovery"
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"k8s.io/kube-openapi/pkg/validation/spec"
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)
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// ClientDiscoveryResolver uses client-go discovery to resolve schemas at run time.
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type ClientDiscoveryResolver struct {
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Discovery discovery.DiscoveryInterface
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}
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var _ SchemaResolver = (*ClientDiscoveryResolver)(nil)
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func (r *ClientDiscoveryResolver) ResolveSchema(gvk schema.GroupVersionKind) (*spec.Schema, error) {
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p, err := r.Discovery.OpenAPIV3().Paths()
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if err != nil {
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return nil, err
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}
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resourcePath := resourcePathFromGV(gvk.GroupVersion())
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c, ok := p[resourcePath]
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if !ok {
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return nil, fmt.Errorf("cannot resolve group version %q: %w", gvk.GroupVersion(), ErrSchemaNotFound)
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}
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b, err := c.Schema(runtime.ContentTypeJSON)
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if err != nil {
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return nil, err
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}
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resp := new(schemaResponse)
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err = json.Unmarshal(b, resp)
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if err != nil {
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return nil, err
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}
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s, err := resolveType(resp, gvk)
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if err != nil {
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return nil, err
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}
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s, err = populateRefs(func(ref string) (*spec.Schema, bool) {
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s, ok := resp.Components.Schemas[strings.TrimPrefix(ref, refPrefix)]
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return s, ok
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}, s)
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if err != nil {
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return nil, err
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}
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return s, nil
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}
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func resolveType(resp *schemaResponse, gvk schema.GroupVersionKind) (*spec.Schema, error) {
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for _, s := range resp.Components.Schemas {
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var gvks []schema.GroupVersionKind
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err := s.Extensions.GetObject(extGVK, &gvks)
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if err != nil {
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return nil, err
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}
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for _, g := range gvks {
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if g == gvk {
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return s, nil
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}
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}
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}
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return nil, fmt.Errorf("cannot resolve group version kind %q: %w", gvk, ErrSchemaNotFound)
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}
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func resourcePathFromGV(gv schema.GroupVersion) string {
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var resourcePath string
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if len(gv.Group) == 0 {
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resourcePath = fmt.Sprintf("api/%s", gv.Version)
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} else {
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resourcePath = fmt.Sprintf("apis/%s/%s", gv.Group, gv.Version)
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}
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return resourcePath
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}
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type schemaResponse struct {
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Components struct {
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Schemas map[string]*spec.Schema `json:"schemas"`
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} `json:"components"`
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}
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const refPrefix = "#/components/schemas/"
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const extGVK = "x-kubernetes-group-version-kind"
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